A man in Florida has been arrested in connection with the suspected mail bombs sent to high profile figures, authorities said Friday morning.

The arrest came after authorities responded to two more devices on Friday — one in Florida, the other in New York — pushing the total number of packages found by law enforcement to 12. None have detonated, but all have put officials high alert as they worried about additional devices being delivered.

The FBI and the Justice Department both confirmed that a person was in custody and said more information would be released at a news conference later Friday.

Authorities had been pursuing a lead that some of the devices could have been mailed from South Florida. After news of the arrest broke, FBI agents and other law enforcement personnel could be seen in news footage draping a blue tarp over a van in a South Florida parking lot.

A law enforcement official said the person in custody was a man in his 50s. According to another person familiar with the investigation, this man lives in Florida near a facility which the packages were mailed through. It remains unclear if this man acted alone or had help, this person said.

News of the arrest emerged hours after investigators recovered the latest explosive devices, packages sent to Sen. Cory Booker (D-N.J.) and former director of national intelligence James R. Clapper Jr.